Yeungnam Univ J Med.  1984 Dec;1(1):95-100. 10.12701/yujm.1984.1.1.95.

Effects of Manually Controlled Ventilation on Gas Exchange during General Anesthesia

• Suh JK
• Suh IS
• Kim HD

• KMID: 2372981
• DOI: http://doi.org/10.12701/yujm.1984.1.1.95

Abstract

In the beginning of anesthetic training, one of the clinical practices that anesthetists have to learn is manually controlled ventilator techniques. The popularity of manually controlled ventilatory techniques has been gradually decreased with increased use for anesthetic ventilators. However it is important and basic for the anesthetists to master manually controlled ventilator techniques skillfully. Recently, we analyzed the arterial blood gas in 30 cases before and during general anesthesia, and studied the effects of the manually controlled ventilation on the pulmonary gas exchange. The results were as follow; 1) Mean value of PaCOâ‚‚ during the manually controlled ventilation, 29.9±2.0 mmHg was decreased statistically comparing with that of PaCOâ‚‚ before the anesthesia, 39.8±2.8 mmHg. 2) Mean values of pH and HCO₃⁻ during the manually controlled ventilation were 7.48±0.03, 22.2±2.4 mEq/1, respectively and values before the anesthesia were 7.41±0.02, 25.2±1.8 mEq/1, respectively. 3) Mean value of PaOâ‚‚ and Oâ‚‚ saturation during the manually controlled ventilation were 270.0±28.8 mmHg, 99.6±0.2%, respectively and values before the anesthesia were 92.5±4.0 mmHg, 96.9±1.0%, respectively. These results indicates that manually controlled ventilation at our department of anesthesiology produced mild hyperventilatory state. However these were no significant changes in cerebral blood flow and other biochemical parameters.

MeSH Terms

Anesthesia
Anesthesia, General*
Anesthesiology
Cerebrovascular Circulation
Hydrogen-Ion Concentration
Pulmonary Gas Exchange
Ventilation*
Ventilators, Mechanical